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價值變化我試圖建立一個自動完成,我使用Observable和主題。但是,只要Subject對象的值發生更改,服務方法就不會被調用。以下是我定義主題的組件代碼。Observable不被稱爲Subject.next()
detailsPersist.component.ts
import { Component, OnInit } from "@angular/core";
import { Subject } from 'rxjs/Subject';
import { DataService } from './data.service';
export class DetailsPersistComponent implements OnInit{
products;
term = new Subject();
constructor(private _dataService: DataService){
}
ngOnInit(){
this._dataService.getSwiftProducts(this.term)
.subscribe(products => this.products = products)
}
search($event) {
let q = $event.target.value
console.log(q)
this.term.next(q)
}
}
以下是你可能想要做這樣的事情對我的數據服務的代碼
data.service.ts
import { Injectable } from '@angular/core';
import { Http, Response, Headers, RequestOptions, URLSearchParams } from '@angular/http';
import 'rxjs/add/operator/map';
import {Observable} from 'rxjs';
@Injectable()
export class DataService{
getSwiftProducts(term): Observable<any>{
return this._http.get("/api/getSwiftProduct/:"+term)
.map(result => this.result = result.json().data)
}
}
謝謝馬丁。正是我需要的......只是編輯了你的答案,因爲沒有提到包含的軟件包 – Apoorv